The analysis of the Coulomb excitation experiment conducted on 104Sn required a strict selection of the data in order to reduce the large background present in the γ-ray energy spectra and identify the γ-ray peak corresponding to the Coulomb excitation events. As a result the B(E2; 0+ → 2+) value could be extracted, which established the downward trend towards 100Sn and therefore the robustness of the N=Z=50 core against quadrupole excitations.
Guastalla, G., DiJulio, D. D., Gorska, M., Cederkall, J., Boutachkov, P., Golubev, P., ... Wollersheim, H. J. (2014). Analysis and results of the Sn-104 Coulomb excitation experiment
. Journal of Physics: Conference Series
, . https://doi.org/10.1088/1742-6596/533/1/012047